Glagolevite Mineral Data

Glagolevite Mineral Data

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General Glagolevite Information

Chemical Formula:

NaMg6[Si3AlO10](OH,O)8·H2O

Composition:

Molecular Weight = 592.47 gm

Sodium 2.95 % Na 3.98 % Na₂O

Magnesium 22.77 % Mg 37.76 % MgO

Aluminum 7.15 % Al 13.51 % Al₂O₃

Iron 0.28 % Fe 0.36 % FeO

Silicon 13.84 % Si 29.61 % SiO₂

Hydrogen 1.65 % H 14.70 % H₂O

Oxygen 51.36 % O

______ ______

100.00 % 99.92 % = TOTAL OXIDE

Empirical Formula:

Na_0.76Mg_5.55Al_0.49Fe²⁺_0.03Si_2.92Al_1.08O_10.35(OH)_7.67·(H₂O)

Environment:

From a phlogopite deposit

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Kovdor massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for A. A. Glagolev (1927-1993), Russian mineralogist.

Synonym:

IMA2001-064

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Glagolevite Crystallography

Axial Ratios:

a:b:c =0.5779:1:1.5818

Cell Dimensions:

a = 5.354, b = 9.263, c = 14.653, Z = 2; alpha = 89.86°, beta = 96.844°, gamma = 90.03° V = 721.52 Den(Calc)= 2.73

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: C1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.544(1)(331,331,060), 2.556(1)(201,132,132), 2.992(0.6)(112.597(0.6)(131,202,131)2.457(0.5)(132,132,203)4.629(0.

Crystal Structure:

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Krivovichev S V , Armbruster T , Organova N I , Burns P C , Seredkin M V , Chukanov N V , American Mineralogist , 89 (2004) p.1138-1141, Incorporation of sodium into the chlorite structure: the crystal structure, of glagolevite, Na(Mg,Al)6[Si3AlO10](OH,O)8

Physical Properties of Glagolevite

Cleavage:

[001] Perfect

Color:

Colorless.

Density:

2.66

Diaphaniety:

Transparent

Fracture:

Flexible - Flexible fragments.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Glagolevite

Gladstone-Dale:

CI meas= 0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2087,KPDmeas= 0.2142,KC= 0.2233

Optical Data:

Biaxial (+), a=1.569, b=1.569, g=1.571, bire=0.0020, 2V(Calc)=0, 2V(Meas)=17. Dispersion dispersion not observed.

Calculated Properties of Glagolevite

Electron Density:

r_electron=2.68 gm/cc
note: r_Glagolevite=2.66 gm/cc.

Fermion Index

Fermion Index = 0.02954
Boson Index = 0.97046

Photoelectric:

PE_Glagolevite= 1.41 barns/electron
U=PE_Glagolevite x r_electron= 3.77 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Glagolevite is Not Radioactive

Glagolevite Classification

Dana Class:

71.4.2.9 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.4)interlayered 1:1, 2:1, and octahedra

(71.4.2)Interstratified Chlorite-Smectite group

71.4.2.1 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

71.4.2.2 Lunijianlaite LiAl6(Si7Al)O20(OH)10 Unk Mono

71.4.2.3 Saliotite Na0.5Li0.5Al3AlSi3O10(OH)5 C 2/m 2/m

71.4.2.4 Tosudite Na0,5(Al,Mg)6(Si,Al)8O18(OH)12·5(H2O) Unk Ortho

71.4.2.5 Corrensite (Ca,Na,K)(Mg,Fe,Al)9(Si,Al)8O20(OH)10·n(H2O) Unk Ortho

71.4.2.6 Kulkeite Na0.35Mg8AlSi7O20(OH)10 Unk Mono

71.4.2.7 Rectorite (Na,Ca)Al4(Si,Al)8O20(OH)4·2(H2O) Unk Mono

71.4.2.8 Aliettite [Mg3Si4O10(OH)2](Ca0.5,Na)0.33(Al,Mg,Fe)2-3(Si,Al)4O10(OH)2·n(H2O) Unk Mono

71.4.2.9 Glagolevite ! NaMg6[Si3AlO10](OH,O)8·H2O C1 1

Strunz Class:

VIII/H.15-20 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups

VIII/H.15 - Agrellite - Mountainite series

VIII/H.15-10 Agrellite NaCa2Si4O10F P1 1

VIII/H.15-20 Glagolevite NaMg6[Si3AlO10](OH,O)8·H2O C1 1

VIII/H.15-30 Mountainite (Ca,Na2,K2)2Si4O10·3(H2O) P 2₁/a,P 2₁/c,P 2₁/n 2/m

Other Glagolevite Information

References:

NAME( AmMin, 89:250) PHYS. PROP.(AmMin, 89:250) OPTIC PROP.(AmMin, 89:250)

See Also:

Links to other databases for Glagolevite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Glagolevite

NaMg6[Si3AlO10](OH,O)8·H2O
Dana No: 71.4.2.9 Strunz No: VIII/H.15-20
Locality:

Notes: